Detachable heel-calk for horseshoes.



No. 817,582. PATENTED APR. 10, 1906.

T. 'W. J. McGANN.

DETACHABLE HEEL GALK FOR HORSESHOES. APPLICATION FILED DEC. 22, 1905.

Fig :1

I] I l WITNESS s. V INVENTOH L; HQMASWJM GAMN z B) A TTOHNE Y8 UNITEDSTATES THOMAS WV. J. McGrANN, OF WASHINGTON, DISTRICT OF COLUMBIAASSIGNOR OF ONE-HALF TO AENEAS COLLINS, OF WASHINGTON DISTRICT OFCOLUMBIA.

PATENT OFFTCE.

Specification oi Letters Patent.

Patented April 10, 1906.

Application filed December 22, 1905. Serial No. 292,920.

To (LZZ whom it may concern.-

Be it known that I, THOMAS W. J. MOGANN, a citizen of the United States,and a resident of ashington, in the District of Columbia, have madecertain new and useful Improvements in Detachable Heel-Calks forHorseshoes, of which the following is a specification.

My invention relates to that form of detachable heel-calk for horseshoeswhich is made in the form of a bridge-piece that extends across the rearends of the shoe from heel to heel. The difficulty has been with thisform of detachable heel-calk to insure its firm adherence to the shoeagainst getting loose and coming off. My invention provides means foraccomplishing this and supplies an efficient heel-calk that can beapplied by any one without sending the horse to the blacksmith and whichis applicable both to plain and roughshod shoes.

It consists in the novel construction and arrangement of partshereinafter described with reference to the drawings, in which Figure 1is an outside face view of the detachable heel-calk applied to aroughshodshoe. Fig. 2 is an end view of the call: looking at the side ofthe rear end of the shoe. Fig. 3 is a section on line 3 3 of Fig. 1, andFig. 3 is a detail of the clamp-bolt. Fig. 4 is a view similar to Fig.2, showing a modification. Fig. 5 is an end view of a calk lookingsidewise the shoe. Fig. 6 is an inside face view; and Fig. 7, a sectionon line 7 7 of Fig. 5, showing a further modification.

In the drawings, Figs. 1 to 3, A represents a horseshoe, which in thisinstance is formed with rigid heel-lugs a.

B is the bridge-shaped heel-calk, which extends across the rear openingof the shoe from heel to heel and is firmly attached thereto. Thisbridge piece is formed with a wedge-shaped call: I), whose ends overhangand rest on top of the shoe-lugs a. It is also formed with rear flangesb b, Which extend outfvardly behind the rear ends of the heels of theshoe, and with horizontal flanges 11 19 which lie flat against the outerface of the shoe just in front of the heel-lugs a a, the middle part ofthe bridge-piece extending into the plane of the horseshoe and havingits ends abutting against the inner sides of the two heels of the shoe.All these parts of the detachable call; B are cast or forged in onepiece.

Through the horizontal flanges b b are formed-bolt-holes 5 b which onthe side of the calk next to the horses hoof take a square shape, asseen in Fig. 6. These holes are so placed that on the inner side of thecalk next to the horses hoof said holes open against the inside edges ofthe shoe, so that the square shank of a bolt C Will touch the insideedges of the shoe. These bolts are formed with heads that overlap theedges of the shoe next to the hoof and are secured by nuts 0 outside thehorizontal flanges of the calks. The portions of the bolts next to theheads are made wedge-shaped, as at c,'being largest next to the head,and this wedgeshaped portion when the bolt is tightened up by the nutbears against the inside edge of the shoe and makes a tight expansion ofthe bridge between the heels of the shoe, so that the detachablecalk isrendered rigid and tight, so that it cannot have any initial looseness,which if it existed would soon allow the calk to come off.

It will be seen that my heel-calk is so fashioned with seats for theheels of the horseshoe at its ends as to lock rigidly against movementforward, backward, downward, or upwardthat is, it is locked by abuttingfaces in all directionsso that the Weight of the horse in stamping orpulling does not come on any bolt, and not only this, but the expandingor wedging action of the .bolt takes up all looseness and causes thecall: to be always held rigid and firm as against initial movement.

As so far described the calk is shown applied to a roughshod horseshoehaving heellugs a a. In Fi s. 4 to 7 I have shown it applied to flat orp ain shoes A having no heellugs. In Fig. 4 the only change in the calkis to form it with a lug Z next to the shoe, which looks into a slot orrecess s cut across the outer face of the heel of the shoe, the otherparts being substantially the same as in Figs. 1, 2, 8. When the'calk isofl this shoe, the moves in the shoe are to be temporarily p ugged withfilling-pieces of steel.

In Figs. 5, 6, and 7 the lug Z and groove 8 of Fig. 4 are omitted andthe flat shoe requires no preparation whatever. The calk,

however, is formed with a flange f, that extends over the upper surfaceof the heel of the shoe neXt to the horses hoof. In this case the calkis prevented from moving to the rear by the expanding action of theshanks of the bolts against the inner sides of the shoe near the heels.This in most shapes of shoes which bend inwardly at the heel will besufficient to lock the calk to the shoe.

In all the forms described the opening in the center of the shoe is notcrossed or 0bstructed by horizontal screws or a longitudinal middle bar,which are liable to be bent or broken by striking a stone, and thusloosening the calk.

Having thus described my invention, what I claim as new, and desire tosecure by Let ters Patent, is-

1. A detachable heel-calk for horseshoes, consisting of a bridge-pieceformed with an outer calk edge and with two seats to receive the heelends of the shoe and two vertical bolts having wedged-shaped shanksadapted to pass through the calk and look over the upper inner edges ofthe shoe and bear with their inclined wedge faces directly against theinner edges of the shoe to make an eX- pandible bridge connectionbetween the heels.

2. A detachable heel-calk for horseshoes, consisting of a bridge-pieceformed with an outer calk edge and with two seats to receive the heelends of the shoe, two vertical bolts clamping the calk to the shoe, andinterlocking means for preventing the rear horizontal movement of thecalk.

3. A detachable heel-calk for horseshoes, consisting of a bridge-pieceformed with an outer calk edge having flanges extending outwardly pastthe rear ends of the heels of the shoe, flat horizontal and perforatedflanges resting against the outer face of the shoe, abutting facesresting between the heels of the shoe and lying in the plane of thesame, and two vertical bolts passin through the perforations of thehorizontal flanges and having wedge-shaped shanks binding against theinner edges of the shoe.

THOMAS W. J. MGGANN.

Witnesses:

EDW. W. BYRN, AENEAS CoLLINs.

